Contents  on 30 August '13

Asteroid/Comet Connection (A/CC) Resources:

The latest A/CC news is available via framed access, RSS news feed RSS news feed, or redirection. - Note: A/CC has a main Web site and also a backup site with its own duplicate RSS news feed.

Navigation tips: Use the << and >> arrows on the menus for each regular section (Observers, Risks, etc.) to move to the previous and next day's news for that section. Use the Index menu item to access specific days through a calendar interface. And use the all-up news archive to access news from any time since A/CC began in early 2002. To keep track of what's new each day, watch the Chronology section.

Traffic Report  on 30 August '13

One object reported inside ten LD

One visitor is reported to be inside a radius of ten lunar distances (LD) from our home world today. 2013 QG11 exits ten LD, passing from 9.24 to 10.56 LD. No other objects are known to be coming this close until mid-November.

This report was generated at 1505 UTC.

Notes: Ten times the distance to the Moon (ten LD) has no astronomical significance but is a useful reporting boundary. Object distances are interpreted by A/CC from JPL Horizons data. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

NEOCP Activity  on 30 August '13

The MPC's NEO Confirmation Page has 60 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 60 objects listed. Of these, 25 were "one nighters." So far The Tracking News has counted a total of 68 listings on the NEOCP today.

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object at Suno Observatory by Birtwhistle et al.

New MPECs  on 30 August '13

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been three MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2013-Q55 - "19:26 UT" - 2013 QN11

MPEC 2013-Q54 - "16:57 UT" - 2005 YV55

<< DOU on 30 Aug. '13 >>  MPEC 2013-Q53 - "06:03 UT" - Daily Orbit Update

Observers  on 30 August '13

Fourteen observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 2 in MPECs 2013-Q53 & 2013-Q55 -- 2013 QN11, 2013 OV2
B75Betelgeuse Station in Italy, 2 in MPEC 2013-Q53 -- 2013 QJ10, 2013 PX6
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 7 in MPECs 2013-Q53 & 2013-Q55 -- 2013 QN11, 2013 QM10, 2013 PY6, 2013 PH3, 363305, 363075, 361611
106Crni Vrh Obs. in Slovenia, 1 in MPEC 2013-Q53 -- 197588
W85LCOGT Cerro Tololo A in Chile, 1 in MPEC 2013-Q54 -- 2005 YV55
W86LCOGT Cerro Tololo B in Chile, 1 in MPEC 2013-Q55 -- 2013 QN11
5682David Tholen's team on Mauna Kea in Hawaii, 3 in MPEC 2013-Q53 -- 2013 PZ38, 2013 OT3, 2013 ML3
B67Mirasteilas Obs. in Switzerland, 1 in MPEC 2013-Q53 -- 2006 EE1
152Moletai Obs. in Lithuania, 1 in MPEC 2013-Q53 -- 108906
A13Naef Obs. in Switzerland, 2 in MPEC 2013-Q53 -- 2010 TN54, 275677
C47Nonndorf Obs. in Austria, 1 in MPEC 2013-Q53 -- 2013 QH11
F51Pan-STARRS 1 (PS1) in Hawaii, 17 in MPECs 2013-Q53, 2013-Q54 & 2013-Q55 -- 2013 QN11, 2013 QN10, 2013 QH10, 2013 QF11, 2013 PF67, 2013 PA7, 2013 GY68, 2011 QD48, 2010 UX95, 2009 QO5, 2006 KD1, 2005 YV55, 2005 QZ151, 2004 NC9, 88188, 154268, 8013
Y00SONEAR Obs. in Brazil, 15 in MPEC 2013-Q53 -- 2010 UX95, 2010 TN54, 2009 WE253, 2006 EE1, 54789, 52762, 303262, 271480, 250620, 243147, 242450, 242216, 215188, 136900, 4953
H36Sandlot Obs. in Kansas, 1 in MPEC 2013-Q53 -- 2013 PN43
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 30 August '13

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2359 UTC)
See the CRT page for a list of all objects rated recently as risks and our ephemerides page for a list of risk-listed objects under current observation.
The time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090. Both also post impact solutions beyond 100 years for a few special objects.
For the latest official risk assessments, and for explanations of the terminology, see the JPL NEO Program Sentry and NEODyS CLOMON2 risk pages.





Notes for Today's Latest Risk Assessments
2013 QN11JPL Sentry21302042-2111366.3e-08-6.40-7.240JPL: "Analysis based on 17 observations spanning .93420 days (2013-Aug-29.4694 to 2013-Aug-30.403597)." Diameter approximately 0.088 km. from mean, weighted H=22.9.

Legend: VI# = VI count, Prob Cum = cumulative probability, PS Cum/Max = cumulative/maximum Palermo Scale, TS = Torino Scale

An impact solution, also known as a "virtual impactor" (VI), is not a prediction but rather a possibility derived from a variant orbit calculation that cannot be eliminated yet based on the existing data. Elimination can come quickly with just a little further observation or may take weeks or months, sometimes years. Once superceded or eliminated, a former impact solution has zero relevance to an object's risk. See Jon Giorgini's "Understanding Risk Pages" to learn more.

Chronology  on 30 August '13

Times are UTC for when items were noted or added by The Tracking News.

2130Noted that JPL Sentry has posted 2013 QN11 as an impact risk - see above
2017Grabbed MPEC 2013-Q55 - 2013 QN11 - see above
1735Grabbed MPEC 2013-Q54 - 2005 YV55 - see above
1505Generated Traffic Report
1503Grabbed MPEC 2013-Q53 - Daily Orbit Update - see above